Hoisting mechanism



1,325,259. Patented Dec. 16,1919.

E. Y. MOORE- HOISTING MECHANISM.

APPHCATION HLED an. 2. Hill.

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E. Y. MOORE.

HOISTING MECHANISM.

APPLICATION man Ma. 2. Ian.

Patented Dec. 16, 1919.

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E. 'Y.' MOORE.

HOISUNG MCHAM$M. APPLICATION FILED II MI. 2. I911.

1,325,259. Patented Dec.16,1919.

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HOISTING MECHANISM.

APPHCATION FILED MAR- 2.19]?- 1,325,259, Patented Dec.16,1919.

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Specification of Letters Patent.

Patented Dec. 1 6; 1919.

Application filed March 2, 1917. Serial No. 151,888.

To all whom it may concern:

Be it known that I, EDWARD Y. Moons, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a certain new Mechand useful Improvement in H oistin anism, ofwhich the following is a fu 1, clear,

and exabt description, reference being had unitism of operation I maysupport a load at a pluralit of points and raise or lower it by a sing eoperation, without changing the relationship of the points of support ortip ing the load.

Knother object is to combine such plural hoistin mechanism with atrolley support adapte to shift the mechanism laterally as a unit whilereserving the relationship between the di erent lift members.

Another object is to render the power mechanism of the hoist simple andcompact and at the same time efiicient in transmitting movement from adriving shaft'to an extended driven shaft which carries a lift pulley atsome distance from the power mechanism.

In accomplishing the above objects, I preferably provide a powermechanism of invention operating a driven shaft on w ich are a pluralityof lift wheels, over which flexible members extend to support the load.I provide aplurality of bearings for the shaft which are rigidlyconnected with the support to which the power mechanism is connected,and I couple the power mechanism to the shaft by a coupling allowingsome independence of alinement, whereby binding on the bearings isprevented. When such hoistin mechanism is intended to be shifted latera1y or trolleyed, I secure a pair of supporting trolleys to thesupporting member which carries the power mechanism and bearings. Eachof these trolleys may readily have four wheels tracking on the lowerflange of an I-beam. Suitable means may be provided for rotatin thewheels of one of the trolleys to shi t the whole mechanism in and out.My invention comprises means by which I carryout the above features, ashereinafter more full ex plalned, and as summerized 1n the claims. Ii

In the drawings Figure 1 is aside elevation of a trolley hoist embodyingmy invention and having two separated lift wheels driven by a singlepower mechanism and each pro vided with a lift chain supporting araising hook.. I call sucha hoisting mechanism a twin-hook hoist. Fig. 2is a vertical section of the hoisting mechanism between the lift wheels;Fig. 3 is a vertical section through one of the trolle supports of thehoisting mechanism, as in icated by the line 3-3 of Fig. 1; Fig. 4 is ahorizontal section through the power mechanism on the axis of thedriving and driven shafts; Fig. 5 is a front elevation of the powermechanism with the hand wheel removed; Figs. 6 and 7 "arevertical crosssections through the power mechanism in planes parallel with Fig. 5,being on planes indicated by the lines 66 and 77 of Fig. at and eachlooking toward the central frame plate; Fig. 8 is a central verticalsection of the power mechanism on the plane of the axes of the drivingand driven shafts; Fig. 9 is a detail of the coupling between the powermechanism and the driven shaft, being a section on the line 99 of Fig.1; Fig. 10 is a detail illustrating the means for racking the hoist byrotating the wheels of one of the trolleys, bemg a sectional elevationon the line 1010 of Fig. 3; Fig. 11 is a detail illustrating one of thedouble eccentrics for driving the yokes of the power mechanism; Figs. 12and 13 are perspectives of the front and rear frame plates of the powermechanism.

As shown in Figs. 1', 2 and 3, 10 indicates the supporting member forthe twin-hook hoist shown. This member is shown as a channel-beam withdownwardly facing flanges. Resting on the top of the channelbeam at oneend, and secured to it, is a plate 11; Bolted to the under side of thisplate is the power mechanism 20. Secured t0 the under side of thechannel-beam are bearing blocks 40 and 41. In these blocks is journaleola shaft 50 which is coupled with the power mechanism by a coupling 60.On the shaft 50 are lift wheels 51 and 52 over which extend chains 53and 54 which carry lift hooks 55 and 56. Each lift hook is shown asprovided with a movable pulley, as 57 and 58, beneath which the chainextends, the other end of the chain being anchored at a suitable pointto the bearin block 40 or 41. The whole structure descri ed is shown assupported by trolleys 7 0 and 71, which ride on the lower flange of anI-beam A,

tries designated I direction and extend 1 will now describe more indetail the various portions of the twin-hook trolley hoist above brieflydescribed. I will first take up the power mechanism 20, though the sameis not claimed herein but in my divisional application No. 169,817,filed May 21, 1917.

The power mechanism is mounted on a vertical central frame plate 21which has at its upper end horizontal lugs 23 and 2a lying against theunder side of the plate 11 and securely bolted thereto. The plate 21 isre cessed at its upper edge a shown at 2.5 to allow it to extend readilybeneath the channel beam 10. The frame of the power mechanism includes,beside the central supporting plate 21, a front plate 26 and a rearplate 27 bolted'to the central plate. These plates 26 and are of thegeneral form shown in Figs. 12 and'13 respectively, being stiffened bywebs and having flanges 28 and 29, respectively, which abutcorrespondingly formed flanges on the central frame plate. The centralframe plate is provided with suitable bosses 30 and 81, and the frontand rear plates have ears 32 and 33 abutting against the ends of thesebosses respectively. The cap screws 35 and 36 passing through the carsinto the bosses hold'the structure together.

The driving shaft of the power mechanism is designated 80. It is mountedin the front frame member 26 and in the central plate 21. This shaft isrotated preferably by a hand wheel 81 mounted on the shaft and connectedwith it in a manner hereinafter described. A chain, not shown. isadapted to rotate the hand wheel.

Mounted on the shaft 80 on the inner face of the front plate 26, is aspur gear 83. This gear meshes with two other spur gears 8a and 85,which are rigid on shafts 86 and 87. These shafts are journaled in thecentral plate 21 and also in the other side plate 27. Between the plates21 and 27 the shafts 86 and 87 are provided, each with twoeccenrespectively 90, 91 and 92, 93. The eccentrics 90 and 92 lie in thesame into circular openings in a yoke plate 95, which has internal teeth96 around an opening in such plate. Similarly, the eccentrics 91 and 93extend in the same direction, which is opposite to the two othereccentrics, and these eccentrics occupy circular openings in the yoke 97which has internal teeth 98. The two sets of internal teeth work on adriven spur gear 101 which is located within the openings of both yokesand mounted on a driven shaft 100, this shaft being journaled in thecentral frame plate 21 and the rear plate 27.

The result of-the above construction is that, as the driving shaft. 80is rotated, the

shafts 8'6 and 87, carrying the eccentrics,

are rotated,and the eccentrics .give the two yokes circulartranslations, or gyrations,

which cause their internal teeth to slowly carry around the driven wheel101 and the driven shaft. It will be seen that the speed of the drivenshaft is dependent on the difference in the number of teeth between thespur gear 101 and the internal gears on the yokes. That is to say, foreach cycle of movement of the yokes the driven shaft is rotated such aportion of a complete rotation as the difference between the number ofinternal teeth on the yoke and the number of external teeth on the spurgear bears to the total number of teeth on the spur gear. The rotationof the driven shaft, therefore, is comparatively slow in proportion tothat of the driving shaft, and thus the power is correspondinglyincreased.

To allow the power mechanism to operate rapidly in the directioncorresponding to a descent of the load, enabling the load to run downfreely when desired, I provide a ratchet device for the driving shaftcontrolled by a friction clutch between the hand wheel and shaft. Theclutch is active on the raising movement, but is released by arelatively backward movement of the hand wheel to allow the shaft 80 toturn independently of the ratchet. Briefly, this mechanism consists of acup 110 freely rotatable on the shaft 80 and provided with ratchet teeth111 on its periphery adapted to be engaged by a pawl 112 carried by thefront plate 25;. Within the cup are a number of friction disks 114connected alternately with the cupand shaft 80. That is to say, thefirst disk may be connected at its inner periphery with the shaft, andthe next disk at its outer periphery with the cup, and so on. Bearingagainst the front of these disks is a plate 115. Against this plate therear face of the hand wheel hub bears. The forward end of this hub isformed. with an incline 117 which bears against an inclined collar 118,rigidly, though adjustably, secured to the shaft 80.

The inclinesbetween the collar 118 and the hand wheel hub are in thedirection to force the hand wheel toward the power mechanism when thehand wheel is turned in the raising direction. Such operation,therefore, clamps the disks and locks the hand wheel to the ratchet cup.The teeth on this cup are in such direction that the cup may rotatefreely under the pawl 112, in the raising direction of rotation.Accordingly, in the raising direction the hand wheel, disks and cuprotate as a unit, the ratchet teeth clicking under the pawl but beingheld thereby whenever the movement ceases.

To lower the load the hand wheel is turned in the opposite direction andthis allows it to 1play back from the clutch, freeing the dis s so thatthe shaft turns independently of theratchet cup, and the load runs downso long as the hand wheelie kept in advance in rotation from that causedby the descendin load. Whenever this advance ceases the 10 isautomatically held by the friction clutch, ratchet and pawl.

Such power mechanism as described, comprising broadly a gyratinginternally toothed yoke driven by an eccentric, and the arrangement oftwo of such yokes operating concurrently, and the arrangement of theclutchcontrolled ratchet, are claimed in prior patents of mine, namely:Nos. 757,333, of April 12, 1904; 794,997, of July 18, 1905; and 946,253,of January 11, 1910. Such patents, however, show a different means fortaking the driven rotation from the driven spur gear to the chain liftwheel. The conception of utilizing the power mechanlsm shown in thosepatents to operate a shaft connected with multiple lift wheelsconstitutes a portion of the present invention, as does also theparticular arrangement of the power mechanism above descrlbed.

The power mechanism described causes a slow rotation of the shaft 100for comparatively rapid rotation of the hand wheel. The shaft 100 isconnected with the shaft 50, which has lift wheels, the latter shaftbeing mounted in the two bearings depending from the channel-beam 10. Toprevent blndlng between the shaft 50 or the shaft 100 andtheir-bearings, I connect these shafts by a coupling allowing someindependence of alinement. It is satisfactory to make this Coupling inthe dental form shown in Figs. 1 and 9, where 61 indicates the hub ofone member secured to the shaft 100 and having two substantiallyquadrant-shaped teeth 62, and 63 indicates a similar member on the shaft50 having quadrant-shaped teeth 64 extendin between the teeth 62. Theplay between t e teeth of the cou ling is suflicient toallow the twoshafts to e somewhat out of alinement and this prevents binding on thebearings.

The bearings for the shaft consist of the block 40 or 41 and the cap 42secured to the under side thereof. Preferably the same bolts 43 whichsecure the block to the channel beam secure also the ca in place. These50 bolts are through-bolts, s own as passin through flan es on the capand block an through the c annel beam, and having heads on one end andnuts on the other. The block 40 or 41 is bifurcated at 45 to providespace for the lift wheel 51 or 52. A recess is also made in the upperface of the cap to provide for the lift wheel, and two openings throughthis cap for the passage of the lift chain 53 or 54. The lift chain isshown as depending in a bight and anchored at its u per end 59 to the ca42. The lift hook 1s of the usual type an has a frame carryin a pulleywhich rests in the bight of the HE:

guide through chain and a suitable chain which the chain extends.

As heretofore stated, the twin hoisting mechanism, above described, mayconveniently be supported and shifted as a unit by trolleys tracking onthe under flange of an Lbeam. Such is the construction illustrated in Fis. 1, 2, 3 and 10, which will now be descri d. Secured to the upper sideof the channel beam 10 is a pair of blocks designated 120 and 121, towhich the trolleys are connected. These blocks may be secured by thesame bolts 43 which hold the bearing blocks 40 and 41. Each block hasbase flanges and an upwardly extending portion to which the frame of thetrolley 70 or 71 is secured, preferably by a horizontal pivot pin 123.

The trolley frame consists of a pair of side members 124 and 125,extending upwardly on opposite sides of a space which may receive theI-beam fiange, and brought together beneath such space and secured bybolts 126. Each of the upwardly extending portions 124 and 125 carries apair of studs 130, on which are journaled wheels 131 and 132. There arefour wheels for each trolley, two on each side, whereby the trolley iseffectively supported, and from it the hoistin mechanlsm described. Bypivoting the tro ley to the hoisting mechanism a certain independence isprovided, preventing strains due to any irregularities in the trackwayand insuring the twin-hook hoist being supported by all the wheels ofboth the trolleys.

To mechanically shift the twin-hook hoist in and out, or rack it, as itis termed, I adopt means for rotating wheels of one of the trolleys. Ihave shown this in the case of the trolley 70 nearest the powermechanism. The wheels 131 of such trolley are each provided with a spurgear 140 rigid with the wheel. These two gears mesh with a pinion 141,Figs. 3 and 10, on a shaft 142. This shaft occupies a bearing in thetrolley member 125, and is provided at its outer end with a hand chainwheel 145. The rotation of this wheel rotates the pinion 141 and therebyrotates the two wheels 131, and this shifts the whole mechanism as aunit, in or out as the case may be.

It will be seen from the construction described, that my twin-hooktrolley hoisting mechanism is adapted to raise or lower two hooks inunitism, or to cause the same to travel lateral] as a unit wheneverdesired. This enables t e raising and transporting of a body which iseither too large to be raised from a single hook or a body which it isdesirable to maintain level b roviding two points of support. Han cains, on the power mechanism hand wheel 81 and on the trolley hand wheel145, provide simple mechanism for simultaneously raising or lowering thelifting members or for racking them in or out together.- uch twooperations may be performed independently or simultaneously, as desired.The power mechanism itself is simple, compact, and very efficient.

Having thus described my invention, what I claim is:

1. The combination of a frame plate, trollys secured to the upper faceof said plate; bearing blocks secured to the under face of said framelate; a shaft journaled in said bearing bloc s, a power mechanism withina frame depending from the frame plate adjacent to one end, said powermechanism having a driven shaft extendingfrom said frame toward theadjacent bearing block substantially in alinement with the firstmentioned shaft, a loose-play cou ling connecting said shafts, and liftmec anism on the shaft first mentioned and supported within said bearingblocks.

2. The combination of a frame plate, trolleys having supporting wheels,bases resting on the frame plate and pivoted to the, trolleys,bifurcated bearing blocks on the underside of the frame plate beneathsaid bases, means rigidly securing the bases and bearing blocks to theframe plate, a power mechanism secured within a frame depending from theframe plate adjacent to one end, said power mechanism having a drivenshaft extending from the frame thereof toward the adjacent bearingblock, a shaft journaled in the bearing blocks alinement with the drivenshaft of the power mechanism, a loose-play coupling connecting saidshafts between the frame of thefpower in substantial in chanism and thead'acent bearin block, 1i wheels on the sha within the %earing blocks,and lift chains extending over the lift wheels.

3. The combination of a frame plate in the form of a downwardly facingchannel beam, trolleys having supporting wheels and bases pivoted to thetrolleys on horizontal pivot-s, said bases restin on the upper face ofthe channel beam, bifurcated bearing blocks on the 'under side of thechannel beam seated within its flanges, means rigidl securin the basesand the bearin bloc s to the c annel beam, a power mecianism secured tothe channel beam and depending therefrom adjacent to one end, said powermechanism having driving and driven shafts and a frame providingbearings for said shafts and gearing connecting the shafts, the drivenshaft extending from said power mechanism frame toward the adjacentbearing block, a shaft journaled in the bifurcated bearing blocks inalinement with the driven shaft of the power mechanism, a loose-playcoupling connecting said shafts between the frame of the power mechanismand the adjacent bearing block, lift wheels on the shaft within thespaces of the bifurcated bearing blocks, and lift chains extending overthe lift wheels.

In testimony whereof, I hereunto affix my signature.

EDWARD Y. MOORE.

